How Sienna Miller Bonded with Chris Kyle's Widow

Taya Kyle opens up about the love she had with the real American Sniper Chris Kyle and the film that is his legacy. Subscribe now for instant access to this emotional, exclusive PEOPLE interview.

"I know it sounds really impersonal, but from the first conversation we had, I felt very close to her, and I felt like I understood her," says Miller, who portrays Taya in American Sniper, the Oscar-nominated blockbuster based on the bestseller by Taya's late husband, Navy SEAL Chris Kyle.